Methods for assessing reliability of a utility company's power system

• US 9,367,936 B2
• Filed: 08/21/2012
• Issued: 06/14/2016
• Est. Priority Date: 07/26/2007
• Status: Active Grant

• Current Assignee: Alstom Technology Ltd. (Alstom SA)
• Original Assignee: Alstom Technology Ltd. (Alstom SA)
• Inventors: Castelli, Gennaro, Hackett, Michael, Howard, Michael Quinn, Jones, Lawrence Edmund, Shung, HuiChu Su, Brand, Heath Daniel
• Primary Examiner(s): Ng, Amy
• Assistant Examiner(s): STITT, ERIK V
• Application Number:
  US13/590,321
• Publication Number:
  US 20120316836A1
• Time in Patent Office: 1,393 Days
• US Class Current: 1/1
• CPC Class Codes: G01R 31/40 Testing power supplies testing photovoltaic devices H02S50/10
• CPC Class Codes: G06F 3/0482 Interaction with lists of selectable items, e.g. menus
• CPC Class Codes: G06F 3/04842 Selection of displayed objects or displayed text elements G06F3/0482 takes precedence
• CPC Class Codes: G06F 3/0486 Drag-and-drop
• CPC Class Codes: G06F 3/14 Digital output to display device ; Cooperation and interconnection of the display device with other functional units
• CPC Class Codes: G06F 3/167 Audio in a user interface, e.g. using voice commands for navigating, audio feedback
• CPC Class Codes: G06Q 10/063 Operations research, analysis or management
• CPC Class Codes: G06Q 10/06315 Needs-based resource requirements planning or analysis
• CPC Class Codes: G06T 11/206 Drawing of charts or graphs
• CPC Class Codes: G06T 11/60 Editing figures and text; Combining figures or text
• CPC Class Codes: G06T 3/40 Scaling of whole images or parts thereof, e.g. expanding or contracting
• CPC Class Codes: G08B 23/00 Alarms responsive to unspecified undesired or abnormal conditions
• CPC Class Codes: G09G 5/377 for mixing or overlaying two or more graphic patterns G09G5/02, G09G5/397 take precedence
• CPC Class Codes: H02J 2203/20 Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
• CPC Class Codes: H02J 3/00 Circuit arrangements for ac mains or ac distribution networks
• CPC Class Codes: H02J 3/0012 Contingency detection
• CPC Class Codes: H02J 3/008 involving trading of energy or energy transmission rights
• CPC Class Codes: H04L 43/045 for graphical visualisation of monitoring data
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 10/50 Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
• CPC Class Codes: Y04S 40/20 : Information technology specific aspects, e.g. CAD, simulation, modelling, system security
• CPC Class Codes: Y04S 50/10 : Energy trading, including energy flowing from end-user application to grid

Abstract

Methods are provided for assessing reliability of a power system of a utility company. At least one main overview display is obtained. Violation markers are displayed on the one main overview display. A monitored elements tab is updated with a list of monitored elements.

Claims

1. A method, comprising:

obtaining at least one main overview display;

displaying violation markers on the at least one main overview display;

updating a monitored elements tab with a list of monitored elements; and

generating at least one user interface comprising information indicating locations and amounts of volt ampere reactive (VAR) reserves available in a power generating system, wherein;

for generation units of the power generating system, a first injection reactive reserve of a generation unit is a first mega VAR (MVAR) maximum of the generation unit minus a first MVAR output of the generation unit, and a first absorption reactive reserve of the generation unit is the first MVAR output of the generation unit minus a first MVAR minimum of the generation unit,

for capacitor banks of the power generating system, a second injection reactive reserve of a capacitor bank is a first summation of nominal MVAR of capacitors of the capacitor bank that are open or disconnected, and a second absorption reactive reserve of the capacitor bank is a second summation of nominal MVAR of capacitors of the capacitor bank that are closed,

for reactor banks of the power generating system, a third injection reactive reserve of a reactor bank is a third summation of nominal MVAR of capacitors of the reactor bank that are closed, and a third absorption reactive reserve of the reactor bank is a fourth summation of nominal MVAR of capacitors of the reactor bank that are open or disconnected, and

for static VAR systems of the power generating system, a fourth injection reactive reserve of a static VAR system is a second MVAR output of the static VAR system minus a second MVAR minimum of the static VAR system, and a fourth absorption reactive reserve of the static VAR system is a second MVAR maximum of the static VAR system minus a second MVAR output of the static VAR system.

2. The method of claim 1, further comprising:

using a reliability assessment module to detect and analyze a base case violation.

3. The method of claim 2, further comprising:

displaying an alert in response to a new violation being determined to have occurred.

4. The method of claim 3, wherein the alert is displayed on a viewport.

5. The method of claim 1, further comprising:

displaying a voltage contour of voltages at buses for respective kilovolt levels.

6. The method of claim 1, further comprising:

selecting a violation marker resulting in a selected violation marker; and

only displaying the selected violation marker on the at least one main overview display while having the other violation markers disappear during an analysis of the situation.

7. The method of claim 6, further comprising:

showing only those violations associated with the selected violation marker on the monitored elements tab.

8. The method of claim 1, further comprising:

showing vital data related to violations selected on the at least one main overview display.

9. The method of claim 8, further comprising:

showing the vital data with a control panel monitor element list.

10. The method of claim 9, further comprising:

displaying a name and a highest percent over a limit value violated.

11. The method of claim 10, wherein details for violations are selected from at least one of a limit value, a current value and a percent over the limit value violated.

12. The method of claim 9, wherein a violation is at a branch and an entry is provided for each end of the branch.

13. The method of claim 1, further comprising:

providing two icons for each monitored element in violation, with one icon locating the monitored element on the at least one main overview display, and another icon for calling an associated line display in a dashboard tab to obtain additional information.

14. The method of claim 1, further comprising:

detecting and analyzing a contingency case violation using a reliability assessment module.

15. The method of claim 14, further comprising:

displaying an alert when a new violation appears following execution of an analysis of the contingency case violation.

16. The method of claim 15, further comprising:

updating a contingent tab in the control panel with a list of contingencies impacting a set of monitored elements in violations.

17. The method of claim 16, further comprising:

using the at least one user interface at the control panel to analyze cause and effect from results provided by contingency analysis.

18. The method of claim 1, wherein material presented on the at least one main overview display includes contingency-related information.

19. The method of claim 1, further comprising:

rendering a relationship determined between monitored elements and contingencies.

20. The method of claim 18, further comprising:

using combinations of the at least one main overview display, the control panel, and violation tool bar filters to enable a user to analyze post contingency case violations.

21. The method of claim 20, wherein an analysis of the post contingency case violations is facilitated by graphical and list formats.

22. The method of claim 18, wherein the control panel shows a monitored element with at least one of a name of the monitored element, a type of violation, base case value, a post contingency value, a limit value associated with an alarm, a violation or warning being presented or a percent over a designated limit.

23. The method of claim 18, wherein when a contingent element creates a violation, a violation maker appears on a branch or substation.

24. The method of claim 23, further comprising:

selecting a contingent element marker for a contingent element; and

displaying all violations that the contingent element creates.

25. The method of claim 18, wherein the control panel includes both a monitored elements tab and a contingency tab.

26. The method of claim 25, wherein the contingency tab is opened when a contingency marker is selected to show a list of contingencies that are impacting the monitored elements in at least one of an alarm state, a violation state and a warning state.

27. An energy management apparatus, comprising:

a control device comprising at least one main overview display that displays violation markers on the at least one main overview display, and updates a monitored elements tab with a list of monitored elements; and

at least one user interface that is generated comprising information indicating locations and amounts of volt ampere reactive (VAR) reserves available in an energy generation system according to conditions, comprising;

for generation units of the energy generation system, a first injection reactive reserve of a generation unit is a first mega VAR (MVAR) maximum of the generation unit minus a first MVAR output of the generation unit, and a first absorption reactive reserve of the generation unit is the first MVAR output of the generation unit minus a first MVAR minimum of the generation unit,

for capacitor banks of the energy generation system, a second injection reactive reserve of a capacitor bank is a first summation of nominal MVAR of capacitors of the capacitor bank that are open or disconnected, and a second absorption reactive reserve of the capacitor bank is a second summation of nominal MVAR of capacitors of the capacitor bank that are closed,

for reactor banks of the energy generation system, a third injection reactive reserve of a reactor bank is a third summation of nominal MVAR of capacitors of the reactor bank that are closed, and a third absorption reactive reserve of the reactor bank is a fourth summation of nominal MVAR of capacitors of the reactor bank that are open or disconnected, and

for static VAR systems of the energy generation system, a fourth injection reactive reserve of a static VAR system is a second MVAR output of the static VAR system minus a second MVAR minimum of the static VAR system, and a fourth absorption reactive reserve of the static VAR system is a second MVAR maximum of the static VAR system minus a second MVAR output of the static VAR system.

28. The energy management apparatus of claim 27, further comprising:

logic resources that provide a notice of conditions which effect energy management.

29. The energy management apparatus of claim 27, wherein the monitored elements tab is updated with the monitored elements in a state selected from at least one of an alarm state, a violation state, and a warning state.

30. The energy management apparatus of claim 27, wherein a branch violation marker is presented on a center of a branch.

31. The energy management apparatus of claim 27, wherein voltage violations are presented at respective corresponding stations where violated elements are situated.

32. The energy management apparatus of claim 27, wherein a color of a marker indicates a severity of a violation.

33. The energy management apparatus of claim 27, wherein a marker is used to indicate a type of a violation.

34. A system, comprising:

a memory that stores executable components; and

a processor, communicatively coupled to the memory, that executes or facilitates execution of the executable components to perform operations, comprising;

obtaining at least one main overview display;

displaying violation markers on the at least one main overview display;

updating a monitored elements tab with a list of monitored elements; and

generating at least one user interface comprising information indicating locations and amounts of volt ampere reactive (VAR) reserves available in a power grid according the following criteria;

for generation units of the power grid, a first injection reactive reserve of a generation unit is a first mega VAR (MVAR) maximum of the generation unit minus a first MVAR output of the generation unit, and a first absorption reactive reserve of the generation unit is the first MVAR output of the generation unit minus a first MVAR minimum of the generation unit,

for capacitor banks of the power grid, a second injection reactive reserve of a capacitor bank is a first summation of nominal MVAR of capacitors of the capacitor bank that are open or disconnected, and a second absorption reactive reserve of the capacitor bank is a second summation of nominal MVAR of capacitors of the capacitor bank that are closed,

for reactor banks of the power grid, a third injection reactive reserve of a reactor bank is a third summation of nominal MVAR of capacitors of the reactor bank that are closed, and a third absorption reactive reserve of the reactor bank is a fourth summation of nominal MVAR of capacitors of the reactor bank that are open or disconnected, and

for static VAR systems of the power grid, a fourth injection reactive reserve of a static VAR system is a second MVAR output of the static VAR system minus a second MVAR minimum of the static VAR system, and a fourth absorption reactive reserve of the static VAR system is a second MVAR maximum of the static VAR system minus a second MVAR output of the static VAR system.

35. The system of claim 34, wherein the monitored elements tab is updated with the monitored elements in a state selected from at least one of an alarm state, a violation state, and a warning state.

36. The system of claim 34, wherein a branch violation marker is presented on a center of a branch.

37. The system of claim 34, wherein voltage violations are presented at respective corresponding stations where violated elements are situated.

38. The system of claim 34, wherein a color of a marker indicates a severity of a violation.

39. The system of claim 34, wherein a marker is used to indicate a type of a violation.